Shadow Girl

Description
A loner, this informer sells information. Her incredible agility enables her to sneak in and out of the battle field quickly and will confuse any opponent!

Using this Borg
Source: http://www.gamefaqs.com/boards/914796-gotcha-force/56038660 Many thanks to Koichimaru.

To play Shadow Girl, you have to play more carefully than with other borgs because of her frailty.

First: Know your enemy. If you are fighting the combining machine borgs, Sasuke, Beam Gunner, Garuda, Flame Ninja, or Cyber Girl Hyper, you're going to have a tough time. Oddly, Shadow Girl does well against fortresses with her X-attack.

Second: Know your surroundings. Shadow Girl lives or dies based on how quickly she can escape fire. In the case of a few fights, using terrain has saved my hide, and even allowed me to completely turn around fights against some of the tougher challenges such as Tar Diver/Jack.

Third: Shadow Girl's X-attack can be used as a dodge. For a split second after the attack triggers, Shadow Girl is incorporeal and thus cannot be harmed. Using Shadow Slash as a last-ditch attempt to escape an attack has saved me before.

Fourth: Abuse the X-attack in Hyper Mode. All of the bad things about Shadow Slash no longer exist in Hyper Mode. It does more damage, there is no delay, and there is no period after the attack where Shadow Girl is vulnerable. This is when Shadow Girl can murder fortresses in record time.

Fifth: PATIENCE! Shadow Girl is fun, but she is very, very fragile. If you are fighting something like a Flame Ninja, bide your time, dodge, run away if necessary. Don't rush in and get owned just because you got impatient. If you are careful and patient, Shadow Girl becomes a powerhouse.

On a final note, leveling Shadow Girl up to level 10 will help with her weaknesses considerably, as she takes less damage and has more HP than her lower-level counterparts. Also, dashing is the easiest way to get her to face the direction you want.

How to Get this Borg
Shadow Girl appears in the mission "Showdown! Hero Borg Unit!" at Stone River. For the 20th Force glitch, her force sequence is 4, 9, 10.